Sounds like you’ve done everything correct so far. I would consider putting the spindle back to matching the other side and tweak the chassis again to get matching side to side in front. That will at least give you a consistent starting point with ride height in front.

When your weights arrive, try getting your %’s after resting some weights in various locations. You might get really close with that much poundage.

BTW: I’ve had a couple of chassis that like 59% rear, but those were shifters (different requirements for rear grip).